Issue 20, 2023

In situ FTIR study of 2D-carbon materials for CO2 splitting under non-thermal plasma environment – selective CO production

Abstract

Carbon dioxide conversion has been considered a promising solution to global warming and the storage of renewable energy as a source of CO. However, it is challenging to develop a process that combines complete conversion from one oxidant (CO2) to another – O2. In this study, CO2 splitting has been investigated and monitored in situ, by using the plasma generated in a glow discharge reactor packed with carbonaceous materials. The results presented in the form of 2D-carbon surface FTIR spectra indicate that materials play here at least a double role as: (i) a solid adsorbent and (ii) an oxygen scavenger, shifting the overall reaction equilibrium to CO – the product side. It was proved that excited surface CO2 species are present as active intermediates. Their origin is not only the transformation from physically adsorbed molecules but also from C[double bond, length as m-dash]O and C–O surface oxides formed through the Boudouard reaction. Microscopic and Raman spectroscopy investigations confirm this statement.

Graphical abstract: In situ FTIR study of 2D-carbon materials for CO2 splitting under non-thermal plasma environment – selective CO production

Supplementary files

Article information

Article type
Paper
Submitted
16 Febr. 2023
Accepted
21 Apr. 2023
First published
21 Apr. 2023

J. Mater. Chem. A, 2023,11, 10677-10683

In situ FTIR study of 2D-carbon materials for CO2 splitting under non-thermal plasma environment – selective CO production

M. Wiśniewski and X. Liu, J. Mater. Chem. A, 2023, 11, 10677 DOI: 10.1039/D3TA00953J

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